sonnia36 wrote: I have a MacBookPro 16, Mac OS Tahoe. It is new
You don't say how new, but it sounds like it's just a few days, is that right? Before searching can work, Photos has to scan all the pictures in a Library and create a database that it can search through, so it can take several days-- especially if you're using the Mac. Photos doesn't want to slow your work down, so it won't do the scanning until it's quiet. Try leaving it plugged in, turned on, and with Photos in the background for several nights. Sometimes, each day you see more and more hits for a particular search, as it builds the database.
Let us know how it goes…